JPS5720847A - Computer system - Google Patents

Computer system

Info

Publication number
JPS5720847A
JPS5720847A JP9403580A JP9403580A JPS5720847A JP S5720847 A JPS5720847 A JP S5720847A JP 9403580 A JP9403580 A JP 9403580A JP 9403580 A JP9403580 A JP 9403580A JP S5720847 A JPS5720847 A JP S5720847A
Authority
JP
Japan
Prior art keywords
collation
case
coincidence
single system
cpus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9403580A
Other languages
Japanese (ja)
Inventor
Hirohisa Hayakawa
Hideo Kanzaki
Hiroshi Sugisaka
Tsuyoshi Mizoguchi
Hiroaki Aotsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9403580A priority Critical patent/JPS5720847A/en
Publication of JPS5720847A publication Critical patent/JPS5720847A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/1633—Error detection by comparing the output of redundant processing systems using mutual exchange of the output between the redundant processing components
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/165—Error detection by comparing the output of redundant processing systems with continued operation after detection of the error

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Hardware Redundancy (AREA)

Abstract

PURPOSE:To simplify the constitution of a controller without lowering the reliability, by collating the outputs of two control arithmetic parts incorporating an automatic hard monitor device and carrying out a single system operation in case a fault is detected and then an operation of the status quo in case no coincidence is obtained through the collation, respectively. CONSTITUTION:CPUs 1 and 2 exchange mutually the arithmetic results through a data transfer bus 9 after the end of an operation and then carry out a collation and decision each. Then the gate of an output module 8 of the CPU side and selected by a selecting circuit 7 only when coincidence is obtained through the above collation. Thus the result of operation is transmitted to an external register 5'. In case no coincidence is obtained, an output of the result of operation is discontinued to the module 8 and at the same time the circuit 7 blocks the gate to ensure an operation of the status quo for the machinery at the working filed. On the other hand, in case a fault is detected by an automatic hard monitor functions incorporated to the CPUs 1 and 2, a CPU down-signal 11 is delivered. Then the operation is changed to the single system operation mode, and thus the operation is carried out with a single system without performing a collation and decision.
JP9403580A 1980-07-11 1980-07-11 Computer system Pending JPS5720847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9403580A JPS5720847A (en) 1980-07-11 1980-07-11 Computer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9403580A JPS5720847A (en) 1980-07-11 1980-07-11 Computer system

Publications (1)

Publication Number Publication Date
JPS5720847A true JPS5720847A (en) 1982-02-03

Family

ID=14099306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9403580A Pending JPS5720847A (en) 1980-07-11 1980-07-11 Computer system

Country Status (1)

Country Link
JP (1) JPS5720847A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6285345A (en) * 1985-08-01 1987-04-18 ハネウエル・インコーポレーテッド Automatic flight controller with multiple disparate data processing channels
JPH01154240A (en) * 1987-09-04 1989-06-16 Digital Equip Corp <Dec> Double-rail processor with error check function added to single-rail interface
JPH01154242A (en) * 1987-09-04 1989-06-16 Digital Equip Corp <Dec> Double-zone failure-proof computer system
US6032265A (en) * 1995-07-18 2000-02-29 Hitachi, Ltd. Fault-tolerant computer system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6285345A (en) * 1985-08-01 1987-04-18 ハネウエル・インコーポレーテッド Automatic flight controller with multiple disparate data processing channels
JPH01154240A (en) * 1987-09-04 1989-06-16 Digital Equip Corp <Dec> Double-rail processor with error check function added to single-rail interface
JPH01154242A (en) * 1987-09-04 1989-06-16 Digital Equip Corp <Dec> Double-zone failure-proof computer system
US6032265A (en) * 1995-07-18 2000-02-29 Hitachi, Ltd. Fault-tolerant computer system

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